Answer:
The answer is 2.258 x 10^24 molecules are presented in 7.5 grams of H2.
Explanation:
I am going to use the chart that I attached to answer this question.
To convert grams to molecules we need to divide by the molar mass and multiply by 6.02 x 10^23, which is the value of a mole.
In this case the molar mass is 2 because the molar mass of H is 1 and we need to multiply by 2 to get the molar mass of 2 hydrogens.
Molar Mass = 1 x 2 = 2
Then, we need to divide the grams that we have by 2 to covert grams into moles. Finally, to convert moles into molecules we need to multiply the moles by 6.02 x 10^23.
7.5 grams / 2 = 3.75 moles
(3.75 moles)(6.02 x 10^23) = 2.258 x 10^24 molecules
Molecules are equal to atoms, so 2.258 x 10^24 molecules = 2.258 x 10^24 atoms
CO2 is produced during respiration by mitochondria.
To know why there is more CO2 in the air that you breathe out than the CO2 which you inhale, we have to know that the carbon which we breathe out as carbon dioxide comes from the waste products (the carbon in the food we eat) like the carbohydrates, fat, and protein which converted in the body by biochemical pathways to glucose. the end products of oxidation of glucose are water and carbon dioxide. This carbon dioxide which dissolved in the human blood is carried to the air in the lung by circulation before it exhales.
Empirical Formula for given compound Ba1C2N2.
<u>Explanation</u>:
<u>Step 1; </u>convert the mass of each element into their molar values by dividing available mass by molar masses.
Molar masses of required elements are as follows; Ba- 137.327, C- 12, N- 14.
<u>Step 2;</u> Divide all the values by the smallest mole value. For given compound after dividing the masses by molar masses we get 0.0690, 0.1383, 0.1378 for elements Ba, C, N respectively. Divide all three values with the least value which is 0.0690 and note these values.
<u>Step 3;</u> Convert all the numbers available into whole numbers by multiplying with suitable values. i.e. 3 if values are 0.33, 2 if values are 0.5 etc.
<u>Step 4;</u> Assign these values to corresponding elements and you will get the above empirical formula.
The bacteria move slower and also when refrigerated there is less liquid so mold is less likely to happen.
